Circular sawing machine



(No ModeL) 2 Sheets-#Sheet 1.

L. HUSTON.

CIRCULAR SAWING MAGHINE.

No. 315,502. Patented Apr. 14, 1885.

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(No Model.)

l V2 Sheets-Sheet 2.

L. HOUSTON.

CIRCULAR SAWINC MACHINE.

Patented Apr. 14, 1.885'.

LEVI HOUSTON, OF MONTGOMERY STATION, PENNSYLVANIA.

CIRCULAR SAWlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 315,502, dated April14, 1885. Application filed February 24, 1885. {No.modcl.)

To @ZZ whom t may concern.-

Be it known that I, 'LEVI HOUSTON, of Montgomery Station, in the countyof Lycoming and State of Pennsylvania, have invented certain new anduseful Improvements in Circular Sawing Machines, of which the followingis a specification.

Myinvention relates to that class of circular sawing machines known asswing-saws, and is designed as an improvement upon that for whichLetters Patent of the United States were granted to me bearing date June17, 1884, and numbered 300,369.

In the drawings, Figure l is a perspective view of my improved device;Fig. 2, a side view; Fig. 3, a sectional view on the line xx, Fig. 2;Figs. 4, 5, 6, and 7, views illustrating sli ghtly-different forms ofthe device.

Ihe objects of my invention are to simplify and cheapen theconstruction, make the ma? chine more compact, and render it easy ofoperation; and to these ends I adopt the construction shown in thedrawings, in which- A A represent the hangers or brackets, which aresecured to the ceiling or overhead timbers, and in which is mounted ashaft, B, which carries the band-wheel C and fast and loose pulleys D E,as usual. Loosely hung upon the shaft B, preferably between the hangersA A', is a depending saw hanger or frame, F, forked at both ends, andcarrying at its lower end a shaft, G, on which is mounted a belt-pulley,II, and saw'I. The saw is provided with a guard, L, having a handle, M,by which to move the swinging frame back andA forth over the bed ortable. The upper forked end of the frame F is fashioned into sleeves orbearings c a', as shown in Figs. 1 and 2, which, fitting closely againstthe hangers A A', prevent side play of the frame.

Motion is communicated to the pulley D by means of a belt from anyconvenient source, and transmitted from pulley D by a belt, K, to thesaw arbor or shaft G, as will be readily understood uponv referring toFig. l.

Upon the upper side of the sleeve or bearing c is a yoke or slotted arm,b, advisably cast upon and as a part ofthe frame F, or, if for anyreason made separate, attached thereto in any convenient manner. Thisslotted arm or yoke is adapted to receive a stud,

f, on the lower arm, c, of a counterbalanced lever, N, which is pivotedat d to the bracket or hanger A, and provided with adjustable weight O,the stud f being provided advisably with an anti-.friction roller, e, asshown in Figs; l and 3.

If, now, the lower end of the saw be swung to one or the other side ofthe vertical plane of the axis of shaft B, the yoke or slotted arm b,the pivotal axis of which is in said plane, will tip or'rock thecounterbalance-lever N upon its pivot d, and thus throw the weight O toone or the other side of the shaft B a dis` tance proportionate to themovement of the frame, as clearly shown in Fig. 3.

Under the arrangement shown and described the counter-balance serves tohold the saw and saw-frame back, in the position shown in full lines inFig. 3, until drawn forward by hand, the counter-weight olfering somebut not a great amount of resistance until it swings back of its pivot,from which point it aids in carrying the saw forward through the wood.The counter-balance O rapidly adjusts itself to any movement of thesaw-frame F, and, being on an independent shaft distinct and separatefrom that of the frame, its weight is not upon said saw-frame or itsshaft.

The counter-balance or weight O is made adjustable upon its arm N, inorder to vary the force or action of the weight, and is held at anydesiredl adjustment by means of a setscrew, l?, passing through theweight and bearing on the arm N.

It is obvious that other equivalent arrangements of the counter-weightmay be adopted-- as, for instance, setting the pivot d o to one side ofthe shaft B and connecting the lever N and frame F by a bar, eitherabove their respective pivots, as in Fig. 4, or below the same, as inFig. 5, or above the pivot of4h one and below the pivot of the other, asin- Figs. 6 and 7. In each ofthese forms the arm or bar constitutes theequivalent of the yoke b.

It is obvious that instead of making the shaft `B stationary andswinging the saw frame thereon, the shaft can be secured rigidly to theframe and turn in the brackets.

The yoke or slotted arm b is closed on its top, as shown, so that whenthe saw-frame is tipped the stud f on its roller will come into ICOContact With the top and limit the movement of the saw-frame, .or stopsmay be provided to limit the movement of the lever N or frame F.

Having thus described my invention, what I elaim isl. In combinationwith hangers or supports A A, and shaft B, mounted therein, sawframe F,mounted on said Shaft, as shown, and provided with an upright slottedarm or yoke, b, arm N, pvoted to the hanger A, provided at its upper endwith a Weight and at its lower end with a stud to engage the yoke, asand for the purpose set forth.

2. In a sawing-machine, the combination, with suitable hangers orsupports, and With a shaft extending from one to the other, of aSaw-frame carried by the shaft and provided above its pivotal point withan arm, a counterweighted lever journaled in the bracket above thesaw-frame and provided with a den pending` arm to engage with and bemoved by the slotted arm or yoke on the swinging frame.

3. In combination with hangers A A', shaft B, carried thereby, saw-frameF, mounted upon the shaft B, and provided above the shaft with slottedarm or yoke b, lever N, pivoted to hanger A, provided at its upper endwith Weight O and at its lower end with a stud to engage with the yokeor arm Z1.

4. In combination with a swinging Sawframe, a pivoted arm or leverprovided with a counter-Weight above its Cent-er of motion, and aconnecting arm or bar extending from the frame to the lever,substantially as described and shown.

Lnvr HoUsroN.

Witnesses.:

F. H. MCGORMIGK, GEO. E. GRAFF.

